基于chirp信号和Multitone信号的频率特性测试方法研究

close all; 
clear all;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%系统离散化及初始值设置%%%%%%%%%%%%%%%%%%%%%%%%%%%
%sys=tf([-5],[2.0e-5 2e-9 1]);
%sys=tf([3.355e7],[1 1.504e3 5.394e5 3.291e7])
%sys=tf([0.7185 0.0068],[1 0.0010 0.0000007])
%sys=tf([-2.6207],[0.0000248 0.0137 1])
%sys=tf([-4.6207],[0.0000248 0.0137 1])
%sys=tf([4.825],[0.024721 0.1009  1])
%sys=tf([-4.825],[0.024721 0.1009  1])
sys=tf([-3],[1.34e6 0.00334 1])
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%基本绘图%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
figure(1);
bode(sys);
grid;